Gruen Factory stems (pair) for caliber 153, 157 & 163 thru 168 - new in envelope

Pair of GRUEN factory stems for calibers 153, 157, and 163 thru 168 and perhaps others, new in envelope. They look to be in fine shape but could use a cleaning. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. If you need a part for a Swiss watch I likely have it so feel free to inquire. Images do a pretty good job of representing the item.